The threatened plague of hail is here summoned by the powerful hand and rod of Moses (Exo 9:22, Exo 9:23), and it obeys the summons, or rather the divine command; for fire and hail fulfil God's word, Psa 148:8. And here we are told,

I.What desolations it made upon the earth. The thunder, and fire from heaven (or lightning), made it both the more dreadful and the more destroying, Exo 9:23, Exo 9:24. Note, God makes the clouds, not only his store-houses whence he drops fatness on his people, but his magazines whence, when he pleases, he can draw out a most formidable train of artillery, with which to destroy his enemies. He himself speaks of the treasures of hail which he hath reserved against the day of battle and war, Job 38:22, Job 38:23. Woeful havoc this hail made in the land of Egypt. It killed both men and cattle, and battered down, not only the herbs, but the trees, Exo 9:25. The corn that was above ground was destroyed, and that only preserved which as yet had not come up, Exo 9:31, Exo 9:32. Note, God has many ways of taking away the corn in the season thereof (Hos 2:9), either by a secret blasting, or a noisy hail. In this plague the hot thunderbolts, as well as the hail, are said to destroy their flocks, Psa 78:47, Psa 78:48; and see Psa 105:32, Psa 105:33. Perhaps David alludes to this when, describing God's glorious appearances for the discomfiture of his enemies, he speaks of the hailstones and coals of fire he threw among them, Psa 18:12, Psa 18:13. And there is a plan reference to it on the pouring out of the seventh vial, Rev 16:21. Notice is here taken (Exo 9:26) of the land of Goshen's being preserved from receiving any damage by this plague. God has the directing of the pregnant clouds, and causes it to rain or hail on one city and not on another, either in mercy or in judgment.

II.What a consternation it put Pharaoh in. See what effect it had upon him, 1. He humbled himself to Moses in the language of a penitent, Exo 9:27, Exo 9:28. No man could have spoken better. He owns himself on the wrong side in his contest with the God of the Hebrews: "I have sinned in standing it out so long." He owns the equity of God's proceedings against him: The Lord is righteous, and must be justified when he speaks, though he speak in thunder and lightning. He condemns himself and his land: "I and my people are wicked, and deserve what is brought upon us." He begs the prayers of Moses: "Entreat the Lord for me, that this direful plague may be removed." And, lastly, he promises to yield up his prisoners: I will let you go. What could one desire more? And yet his heart was hardened all this while. Note, The terror of the rod often extorts penitent acknowledgments from those who have no penitent affections; under the surprise and smart of affliction, they start up, and say that which is pertinent enough, not because they are deeply affected, but because they know that they should be and that it is meet to be said. 2. Moses, hereupon, becomes an intercessor for him with God. Though he had all the reason in the world to think that he would immediately repent of his repentance, and told him so (Exo 9:30), yet he promises to be this friend in the court of heaven. Note, Even those whom we have little hopes of, yet we should continue to pray for, and to admonish, Sa1 12:23. Observe, (1.) The place Moses chose for his intercession. He went out of the city (Exo 9:33), not only for privacy in his communion with God, but to show that he durst venture abroad into the field, notwithstanding the hail and lightning which kept Pharaoh and his servants within doors, knowing that every hail-stone had its direction from his God, who meant him no hurt. Note, Peace with God makes men thunderproof, for thunder is the voice of their Father. (2.) The gesture: He spread abroad his hands unto the Lord - an outward expression of earnest desire and humble expectation. Those that come to God for mercy must stand ready to receive it. (3.) The end Moses aimed at in interceding for him: That thou mayest know, and be convinced, that the earth is the Lord's (Exo 9:29), that is, that God has a sovereign dominion over all the creatures, that they all are ruled by him, and therefore that thou oughtest to be so. See what various methods God uses to bring men to their proper senses. Judgments are sent, judgments removed, and all for the same end, to make men know that he Lord reigns. (4.) The success of it. [1.] He prevailed with God, Exo 9:33. But, [2.] He could not prevail with Pharaoh: He sinned yet more, and hardened his heart, Exo 9:34, Exo 9:35. The prayer of Moses opened and shut heaven, like Elias's (Jam 5:17, Jam 5:18), and such is the power of God's two witnesses (Rev 11:6); yet neither Moses nor Elias, nor those two witnesses, could subdue the hard hearts of men. Pharaoh was frightened into a compliance by the judgment, but, when it was over, his convictions vanished, and his fair promises were forgotten. Note, Little credit is to be given to confessions upon the rack. Note also, Those that are not bettered by judgments and mercies are commonly made worse.

It is enough - There is no need of any farther plague; I submit to the authority of Jehovah and will rebel no more.

Mighty thunderings - כלת אלהים koloth Elohim, voices of God; - that is, superlatively loud thunder. So mountains of God (Psa 36:6) means exceeding high mountains. So a prince of God (Gen 23:6) means a mighty prince. See a description of thunder, Psa 29:3-8 : "The Voice Of The Lord is upon the waters: the God of glory thundereth; the Lord is upon many waters. The voice of the Lord is powerful; the voice of the Lord is full of majesty. The voice of the Lord breaketh the cedars. The voice of the Lord divideth the flames of fire. The voice of the Lord shaketh the wilderness," etc. The production of rain by the electric spark is alluded to in a very beautiful manner, Jer 10:13 : When he uttereth his voice, there is a multitude of waters in the heavens. See Clarke's note on Gen 7:11, and Gen 8:1 (note).

And Moses said unto him, as soon as I am gone out of the city,.... Zoan or Tanis, for it was in the field of Zoan where these wonders were wrought, Psa 78:12, the reason why he went out of the city to pray, Jarchi says, was because it was full of idols; but the truer reason was, that he might be private and alone while he was praying to God; and perhaps he went out also to show that he was not frightened at the storm, or afraid of being destroyed by it, and was confident of preservation in the midst of it, in the open field, by the power of God, whom he served:

I will spread abroad my hands unto the Lord; which was a prayer gesture directed to by the light of nature, and was used very anciently, and by the Heathens, as well as others; of which the learned Rivet has given many instances in his comment on this text:

and the thunder shall cease, neither shall there be any more hail; this he had faith in, and full assurance of before he prayed for it; he knew the mind and will of God, and not only he knew what he could do, but what he would do, and which he tells Pharaoh of before hand; which was a full proof that he was a god to Pharaoh, as the Lord said he had made him, Exo 7:1.

that thou mayest know how that the earth is the Lord's; that the whole earth is his, and therefore he can do, and does in it whatever he pleases; as the heavens also are his, and therefore can cause thunder, lightning, hail, and rain, and stop them when he thinks fit; or that the land of Egypt particularly was his, and not Pharaoh's, and therefore could destroy, or save it at his pleasure; and particularly it being his, Pharaoh had no right to detain his people in it against his will, who was Lord of it.

Pharaoh sent, and called for Moses and Aaron, and said unto them, I have sinned--This awful display of divine displeasure did seriously impress the mind of Pharaoh, and, under the weight of his convictions, he humbles himself to confess he has done wrong in opposing the divine will. At the same time he calls for Moses to intercede for cessation of the calamity. Moses accedes to his earnest wishes, and this most awful visitation ended. But his repentance proved a transient feeling, and his obduracy soon became as great as before.